The project also had had a tangible demonstration impact.
Is the above sentence grammatically correct? The event occurred a few years ago.
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Sign up to join this communityIt would be grammatical in the right context. 'had had' is past perfect, referring to the past of the past, or something that happened earlier than a past tense context. A suitable past tense context could be:
Last year, the director requested an increase of funding. She said the research had begun to yield interesting results. The project also had had a tangible demonstration impact.
italics = past tense, time -x, bold = past perfect, time -x-y